Welcome to vmware community.
In order to install VCSA 6.7U3 from Mac Catalina workstation you have to download the "VMware-VCSA-all-version_number-build_number.iso" from the VMware Web site at https://my.vmware.com/web/vmware/downloads.
Confirm that the md5sum is correct.
See the VMware Web site topic Using MD5 Checksums at http://www.vmware.com/download/md5.html.
Mount or extract the ISO image to the client machine from which you want to deploy the appliance.
Note: For Mac OS, you can use DiskImageMounter.
You can refer to the below doc for more details:
Yes, I know how it should work. I've installed or upgraded many vCenters many dozens of times from my Mac workstation.
I'm saying Catalina is _different_ due to Apple's increased security profile.
I can take the same ISO for the vCenter 6.7U3 installer on an older Mac workstation, and install it fine.
Using the same ISO mounted on two different Catalina Mac computers, I have problems. The first two problem seem to be able to get around. The one with the libraries not being from a trusted vendor put a stop in my ability to do this from Catalina.
And of course, it works fine from a windows workstation.
BTW: If anybody stumbles across this post.
William Lam at VMware made a blog posting about this issue, and has a workaround listed in his blog
You can try the below steps as a workaround if you are okay to disable the security until you finish the VC deployment. Else you to try to install VC from different machine.
1. Execute `sudo spctl --master-disable` in terminal and set "Allow apps download from" to "anywhere" in Security and Privacy settings.
2. Execute `sudo xattr -r -d com.apple.quarantine <Path to the iso>`
Example: sudo xattr -r -d com.apple.quarantine VMware-VCSA-all-6.7.0-Update-15132721
3. Mount the iso and open UI Installer
4. Install/Upgrade vCenter Server 6.7/7.0
5. Execute `sudo spctl —master-enable` in terminal
—> This will turn the security back on to protect against other unsigned/verified apps.
If you think your queries have been answered. Mark this response as "Correct" or "Helpful".
I used William Lam's instructions from the blog I linked above for successful installation of VCSA 6.7 (and now VCSA 7.0) from a Mac Catalina workstation.
So, yes, I'm all set, the instructions are a little different, you may not need the spctl as I didn't use it, but the xattr line was key I believe.